Monolithic Power Systems Inc. EVCS1806-S-5-50-00A

Overview

EVCS1806-S-5-50-00A from Monolithic Power Systems is a 2-layer evaluation board for the MCS1806GS-5-50 Hall-effect current sensor, supporting 5V supply and ±50A primary current sensing with 40 mV/A typical sensitivity and <2.5% total accuracy across 10–100% of range; used to validate isolated current measurement in motor drives and power supplies.

For engineers reviewing the EVCS1806-S-5-50-00A datasheet, EVCS1806-S-5-50-00A pinout, EVCS1806-S-5-50-00A application, or EVCS1806-S-5-50-00A equivalent, this board enables rapid functional validation of galvanically isolated, differential Hall-based DC/AC current sensing under real-world PCB layout and noise conditions.

Technical Context

The EVCS1806-S-5-50-00A implements a fixed-gain, single-ended analog output interface for the MCS1806GS-5-50 IC, with VOUT = 0.5 × VCC + (40 mV/A) × IP, referenced to GND and filtered via optional C4 (0–100 nF) to adjust bandwidth and suppress ripple. Primary conductor terminals (IP+, IP−) are physically isolated from signal pins by ≥3 kVRMS reinforced insulation.

It integrates screw-terminal connections (Keystone 8191K-ND), decoupling capacitors (C1: 0.1 µF, C2: 4.7 µF), and unpopulated pads for C3/C4 to support configurable filtering and startup transient analysis-enabling direct correlation between measured VOUT and applied DC/AC current without external signal conditioning.

Key Specifications

Availability

EVCS1806-S-5-50-00A is available at Aetrix Electronics and suitable for motor control validation, industrial power supply design, and energy metering prototyping requiring stable component supply and traceable evaluation hardware.

Supply support for EVCS1806-S-5-50-00A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with core expertise in DC/DC converters, LED drivers, and precision analog sensors.

This evaluation board belongs to MPS's current-sensing platform built around the MCS1806GS series, designed specifically to replace optocoupler-based isolation in AC/DC and DC/DC systems while delivering linear, low-drift, Hall-based current feedback.

FAQ

What is the purpose of the JP1 and JP2 jumpers on the EVCS1806-S-5-50-00A board?

JP1 and JP2 are unpopulated test points labeled "VOUT" and "GND" in the schematic, intended for oscilloscope probe attachment during dynamic current testing; they do not configure functionality but provide low-inductance access to the analog output node without loading the signal path.

Can the EVCS1806-S-5-50-00A be used with a 3.3 V supply instead of 5 V?

No - this specific variant (EVCS1806-S-5-50-00A) is configured for 5 V operation only, matching the MCS1806GS-5-50 sensor's VCC rating; using 3.3 V would violate the IC's absolute maximum ratings and result in undefined output behavior or damage.

How does the board achieve 3 kVRMS isolation between primary and secondary sides?

Isolation is achieved through the MCS1806GS-5-50's internal SOIC-8 package construction, which features reinforced creepage/clearance and molded insulation between primary conductor leads (IP+, IP−) and secondary signal pins (VCC, VOUT, GND); the PCB maintains ≥8 mm spacing across the isolation barrier.

What role does capacitor C4 play in system performance?

C4 sets the sensor's small-signal bandwidth: when populated (e.g., 100 nF), it reduces high-frequency noise and ripple on VOUT at the cost of slower step response; with C4 open, bandwidth exceeds 100 kHz, preserving fast current transients for inverter switching analysis.

Is the primary conductor path rated for continuous 50 A current?

Yes - the copper traces connecting IP+ and IP− are designed for ≥50 A RMS continuous current at 25°C ambient, verified per IPC-2152 standards; derating applies above 40°C ambient or with sustained >80% duty cycle.

Does the board include calibration data or factory-trimmed offsets?

No - the EVCS1806-S-5-50-00A provides raw sensor output only; offset and gain calibration must be performed in-system using known reference currents, as the MCS1806GS-5-50 IC itself has no onboard digital calibration or EEPROM storage.